Joi验证设置默认为空对象 [英] Joi validation set default as empty object

问题描述

我遇到了Joi验证的问题(或我认为是的问题).如果要将它作为请求正文的一部分传递，我正在尝试为不存在的键分配一个值.

I'm running into an issue (or what I believe to be one) with Joi validation. I'm trying to assign a value to a non-existent key if it's been passed as part of the request body.

例如:

parameters: Joi.object().keys({
  keyA: Joi.string().allow('').allow(null).default(null),
  keyB: Joi.object().keys({
    b1: Joi.string(),
    b2: Joi.string(),
    b3: Joi.object().keys({
      b3_1: Joi.string(),
      b3_2: Joi.string(),
      b3_3: Joi.string()
    })
  }).default({}),
  keyC: Joi.object().keys({
    c1: Joi.number(),
    c2: Joi.number(),
    c3: Joi.boolean(),
    c4: Joi.boolean()
  }).default({}),
  keyD: Joi.object().keys({
    d1: Joi.number(),
    d2: Joi.number()
  }).default({}),
  keyE: Joi.object().keys({
    e1: Joi.number()
  }).default({}) 
}).allow(null)

如果要传递，请具体说明:

So to be specific if I were to pass in:

{
  keyA: "foo",
  keyD: {
    d1: 21.9,
    d2: 21.1
  },
  keyE: {
    e1: 42
  }
}

我会得到这个回报

{
  keyA: "foo",
  keyB: {},
  keyC: {},
  keyD: {
    d1: 21.9,
    d2: 21.1
  },
  keyE: {
    e1: 42
  }
}

在空对象上使用:eyes:. Joi.default()方法缺少什么?我会过度使用Joi的意思吗?

With :eyes: on the empty objects. What am I missing with the Joi.default() method? Am I overextending what Joi is meant for?

推荐答案

我首先要指出问题中的模式不是有效的JavaScript，在声明规则之前，您已经关闭了太多括号. keyC.我假设这只是问题的格式错误，并且您的实际架构当前有效.

I'll start by pointing out that the schema in your question isn't valid JavaScript, you've closed a few too many brackets before declaring the rule for keyC. I'll assume this is simply a formatting error with the question and your actual schema is currently valid.

第二，您声明默认值的方式没有任何问题.它工作得很好.我假设这是验证模式的方法，这就是问题所在.

Secondly, there's nothing wrong with how you've declared your defaults.. it works just fine. I'll assume it's the way you're validating the schema which is the problem.

尝试运行此程序.我在 default()的文档中模仿了验证方法.

Try running this. I've mimicked the validation method in the docs for default().

const schema = Joi.object().keys({
    keyA: Joi.string().allow('').allow(null).default(null),
    keyB: Joi.object().keys({
        b1: Joi.string(),
        b2: Joi.string(),
        b3: Joi.object().keys({
            b3_1: Joi.string(),
            b3_2: Joi.string(),
            b3_3: Joi.string()
        })
    }).default({}),
    keyC: Joi.object().keys({
        c1: Joi.number(),
        c2: Joi.number(),
        c3: Joi.boolean(),
        c4: Joi.boolean()
    }).default({}),
    keyD: Joi.object().keys({
        d1: Joi.number(),
        d2: Joi.number()
    }).default({}),
    keyE: Joi.object().keys({
        e1: Joi.number()
    }).default({})
}).allow(null);

Joi.validate({
    keyA: "foo",
    keyD: {
        d1: 21.9,
        d2: 21.1
    },
    keyE: {
        e1: 42
    }
}, schema, (err, value) =>
{
    if (err)
        throw err;

    console.log(value);
});

我在控制台中得到这个:

I get this in the console:

{
    keyA :'foo',
    keyD: {
        d1: 21.9,
        d2: 21.1
    },
    keyE: {
        e1: 42
    },
    keyB: {},
    keyC: {}
}

这些键看起来不太可能像您预期的输出那样有序，但这与

The keys are unlikely to look ordered like your expected output, but that shouldn't matter as object keys are not ordered anyway.

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